From www.whatculture.com:
"When you really boil it down, film is an entirely sensory experience. One that specifically targets your eyes and ears to tell emotionally engaging stories and evoke all manner of feelings.
All films across the spectrum utilise audio and visuals in a specific way to draw you in, but arguably no genre makes better use of them than horror.
Be it via the use of eye-watering colours, otherworldy sound-effects, or brash, unconventional editing styles, there are many ways that directors and their crews can arouse feelings of fear and anxiety within the viewer without resorting to senseless violence or perverse titillation."